gre: export gre_handle_offloads() function.
This is required for OVS GRE offloading. Signed-off-by: Pravin B Shelar <pshelar@nicira.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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752f36da68
Коммит
45f2e9976c
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@ -34,6 +34,7 @@ int gre_cisco_register(struct gre_cisco_protocol *proto);
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int gre_cisco_unregister(struct gre_cisco_protocol *proto);
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void gre_build_header(struct sk_buff *skb, const struct tnl_ptk_info *tpi,
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int hdr_len);
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struct sk_buff *gre_handle_offloads(struct sk_buff *skb, bool gre_csum);
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static inline int ip_gre_calc_hlen(__be16 o_flags)
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{
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@ -93,6 +93,35 @@ void gre_build_header(struct sk_buff *skb, const struct tnl_ptk_info *tpi,
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}
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EXPORT_SYMBOL_GPL(gre_build_header);
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struct sk_buff *gre_handle_offloads(struct sk_buff *skb, bool gre_csum)
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{
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int err;
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if (likely(!skb->encapsulation)) {
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skb_reset_inner_headers(skb);
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skb->encapsulation = 1;
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}
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if (skb_is_gso(skb)) {
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err = skb_unclone(skb, GFP_ATOMIC);
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if (unlikely(err))
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goto error;
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skb_shinfo(skb)->gso_type |= SKB_GSO_GRE;
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return skb;
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} else if (skb->ip_summed == CHECKSUM_PARTIAL && gre_csum) {
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err = skb_checksum_help(skb);
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if (unlikely(err))
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goto error;
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} else if (skb->ip_summed != CHECKSUM_PARTIAL)
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skb->ip_summed = CHECKSUM_NONE;
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return skb;
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error:
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kfree_skb(skb);
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return ERR_PTR(err);
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}
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EXPORT_SYMBOL_GPL(gre_handle_offloads);
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static __sum16 check_checksum(struct sk_buff *skb)
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{
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__sum16 csum = 0;
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@ -223,31 +223,6 @@ static int ipgre_rcv(struct sk_buff *skb, const struct tnl_ptk_info *tpi)
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return PACKET_REJECT;
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}
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static struct sk_buff *handle_offloads(struct ip_tunnel *tunnel, struct sk_buff *skb)
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{
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int err;
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if (skb_is_gso(skb)) {
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err = skb_unclone(skb, GFP_ATOMIC);
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if (unlikely(err))
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goto error;
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skb_shinfo(skb)->gso_type |= SKB_GSO_GRE;
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return skb;
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} else if (skb->ip_summed == CHECKSUM_PARTIAL &&
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tunnel->parms.o_flags&TUNNEL_CSUM) {
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err = skb_checksum_help(skb);
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if (unlikely(err))
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goto error;
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} else if (skb->ip_summed != CHECKSUM_PARTIAL)
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skb->ip_summed = CHECKSUM_NONE;
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return skb;
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error:
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kfree_skb(skb);
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return ERR_PTR(err);
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}
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static void __gre_xmit(struct sk_buff *skb, struct net_device *dev,
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const struct iphdr *tnl_params,
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__be16 proto)
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@ -255,11 +230,6 @@ static void __gre_xmit(struct sk_buff *skb, struct net_device *dev,
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struct ip_tunnel *tunnel = netdev_priv(dev);
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struct tnl_ptk_info tpi;
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if (likely(!skb->encapsulation)) {
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skb_reset_inner_headers(skb);
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skb->encapsulation = 1;
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}
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tpi.flags = tunnel->parms.o_flags;
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tpi.proto = proto;
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tpi.key = tunnel->parms.o_key;
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@ -279,7 +249,7 @@ static netdev_tx_t ipgre_xmit(struct sk_buff *skb,
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struct ip_tunnel *tunnel = netdev_priv(dev);
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const struct iphdr *tnl_params;
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skb = handle_offloads(tunnel, skb);
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skb = gre_handle_offloads(skb, !!(tunnel->parms.o_flags&TUNNEL_CSUM));
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if (IS_ERR(skb))
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goto out;
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@ -318,7 +288,7 @@ static netdev_tx_t gre_tap_xmit(struct sk_buff *skb,
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{
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struct ip_tunnel *tunnel = netdev_priv(dev);
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skb = handle_offloads(tunnel, skb);
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skb = gre_handle_offloads(skb, !!(tunnel->parms.o_flags&TUNNEL_CSUM));
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if (IS_ERR(skb))
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goto out;
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